Instruction manual

MS 201 T
English
35
If engine is down on power, difficult to
start or runs poorly at idling speed, first
check the spark plug.
Fit a new spark plug after approx. 100
operating hours or earlier if the
electrodes are badly eroded.
Wrong fuel mix (too much engine oil in
the gasoline), a dirty air filter and
unfavorable running conditions (mostly
at part throttle etc.) affect the condition
of the spark plug. These factors cause
deposits to form on the insulator nose
which may result in trouble in operation.
Removing the spark plug
N Move the master control lever to the
stop position 0
N Releasing the chain brake
N Turn the captive nut (1) to the left
until it hangs loosely in the chain
sprocket cover
N Remove the chain sprocket
cover (2) with captive nut
N Pull off the spark plug boot
N Unscrew spark plug
Checking the Spark Plug
N Clean dirty spark plug.
N Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N Use only resistor type spark plugs of
the approved range.
Rectify problems which have caused
fouling of spark plug:
– Too much oil in fuel mix.
– Dirty air filter.
– Unfavorable running conditions,
e.g. operating at part load.
Spark Plug
0012BA002 KN
H
L
1
0011BA002 KN
2
0011BA020 KN
000BA039 KN
A